From: Jeff Law <law@gcc.gnu.org>
Date: Fri, 2 Apr 1993 00:38:33 +0000 (-0700)
Subject: reorg.c (redundant_insn_p): Stop searching for a redundant insn if an INSN or JUMP_IN... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ca104c130db31bfa029fd876932e29bd34cdad10;p=gcc.git

reorg.c (redundant_insn_p): Stop searching for a redundant insn if an INSN or JUMP_INSN with delayed...

	* reorg.c (redundant_insn_p): Stop searching for a redundant
	insn if an INSN or JUMP_INSN with delayed effects is
	encountered.

From-SVN: r3989
---

diff --git a/gcc/reorg.c b/gcc/reorg.c
index 787d9ff2b10..a125a824ce7 100644
--- a/gcc/reorg.c
+++ b/gcc/reorg.c
@@ -1729,11 +1729,27 @@ redundant_insn_p (insn, target, delay_list)
 
       if (GET_CODE (pat) == SEQUENCE)
 	{
-	  /* Stop for a CALL and its delay slots because it difficult to track
-	     its resource needs correctly.  */
+	  /* Stop for a CALL and its delay slots because it is difficult to
+	     track its resource needs correctly.  */
 	  if (GET_CODE (XVECEXP (pat, 0, 0)) == CALL_INSN)
 	    return 0;
 
+	  /* Stop for an INSN or JUMP_INSN with delayed effects and its delay
+	     slots because it is difficult to track its resource needs 
+	     correctly.  */
+
+#ifdef INSN_SETS_ARE_DELAYED
+	  if (INSN_SETS_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+	    return 0; 
+#endif
+
+#ifdef INSN_REFERENCES_ARE_DELAYED
+	  if (INSN_REFERENCES_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+	    return 0; 
+#endif
+
+	  /* See if any of the insns in the delay slot match, updating
+	     resource requirements as we go.  */
 	  for (i = XVECLEN (pat, 0) - 1; i > 0; i--)
 	    if (GET_CODE (XVECEXP (pat, 0, i)) == GET_CODE (insn)
 		&& rtx_equal_p (PATTERN (XVECEXP (pat, 0, i)), ipat))
@@ -1816,6 +1832,19 @@ redundant_insn_p (insn, target, delay_list)
 	  if (GET_CODE (XVECEXP (pat, 0, 0)) == CALL_INSN)
 	    return 0;
 
+	  /* If this this is an INSN or JUMP_INSN with delayed effects, it
+	     is hard to track the resource needs properly, so give up.  */
+
+#ifdef INSN_SETS_ARE_DELAYED
+	  if (INSN_SETS_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+	    return 0; 
+#endif
+
+#ifdef INSN_REFERENCES_ARE_DELAYED
+	  if (INSN_REFERENCES_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+	    return 0; 
+#endif
+
 	  /* See if any of the insns in the delay slot match, updating
 	     resource requirements as we go.  */
 	  for (i = XVECLEN (pat, 0) - 1; i > 0; i--)